There are several reasons that we do not track the tribute on items:
  1. Tribute is more subject to change than the other attributes on most items, and we already have a hard enough time getting updates on item info.
  2. The spell and item database Lucy already tracks tribute values on all items in their database. As their database is also automatically updated by people running their software, it is more accurate than ours could ever be.
  3. There's a lot at stake with tribute. People may invest substantial amounts of money in making or buying items for their tribute value. Therefore, we would rather send people to Lucy for tribute information, to reduce the chance of money lost due to changes in the game.